Dentist&#39;s tweezers.



No. 836,299. PATENTED ov. 20,1906. w. w BURGIN. DENTISTS, TWEBZERS.

APPLIOATION FILED PEBfll, 1904.

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UNITED STATES PATENT ()FFIOE.

WELBY W. BURGIN, OF RICHMOND, KENTUCKY.

DENTISTS TWEEZERS.

Specification of Letters Patent. Patented Nov. 20, 1906.

Application filed February 11, 1904. Serial No. 193,091.

To all iuhom it m y COW/061%! means. One of the arms is provided with aBe it known that I, WELBY W. BURGIN, a l stud or pin 5, which registerswith the hole 6 citizen of the United States, residing at Richj in theother arm in order to bring the fine mond,in Madison county,State ofKentucky, 5. points accurately together. Both arms are have inventedcertain new and useful Im- 1 provided with slots 3, in which is placed aprovements in Dentists Tweezers, of which sliding bolt 4, which when thearms are the following is a specification. j pressed together easilyslides downward in My invention relates to pliers or tweezers the slotsand holds the jaws together. especially adapted for dentists use, and isj It will be observed that by this construcparticularly designed for thehandling of tion the points of the steel tool which are exgold incleaning and purifying it by heat and posed to the acid in use areentirely protected acids. by the platinum and that the platinum Theobjects are to provide the tool with points are rigidly supported downto their points or tips adapted to hold small particles j extreme ends.The result is that no chemfirmly and capable of being plunged into theical deposit is made upon the gold, and thereflame and the acid withouttarnishing or infore there is no waste in the use of this majuring thegold, and to provide the tool with terial. improved means forregistering the points Having thus described my invention and and forholding the jaws together.

its use, what I claim as new, and desire to In the accompanyingdrawings, Figure 1 secure by Letters Patent, is the following: shows inperspective a tool embodying my 1. As an article of manufacture, a pair0 several improvements, and Fig. 2 is a section spring-jaws and means toregister them toof the sheath on the point of the jaw.

gether, said jaws having fine tapered points In dental work it will beunderstood that it of steel, and each having a sheath of non isnecessary to thoroughly clean and purify corrosive and relativelyinfusible material the small bits of gold used for filling just such asplatinum formed as aclosed tube and prior to their insertion in place,which is done covering the sharp points neatly to their exby firstheating the gold and then immetreme ends, substantially as described.diately plunging it into a strong acid and 2. The combination withapairof tweezers then washing. If ordinary steel pliers were having pointedjaws, and means for accurately registering them, of tapering closedtubular sheaths on said points composed of platinum and fitting andsupported by the hard metal points to their extreme ends, whereby saidpoints may be used in acids and flame without corrosion and areadaptable to very small objects, substantially as described.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

WELBY W. BURGIN.

used, the heating and the acid invariably causes a deposit of injuriouschemicals on the part of the gold which is in contact with the tool,which of course causes waste of gold and soon renders the tool unfit foruse and is generally disadvantageous. that providing the tips of thetool with a platinum sheath fixed onin a peculiar way avoids all thesedifficulties, because platinum j is not affected by the acid, makes nodeposit on the gold, and easily withstands the high 1 degree of heat. IIn the drawings, the two arms 1 are tipped with sleeves 2, formed ofplatinum tubes, made to neatly fit the steel points throughout andsecured thereon by any desirable j Witnesses:

HARVEY Ci-IENAULT, R. C. STOCKTON.

